100Pcs 20mm Self Healing Injection Ports,vials Rubber stoppers,Butyl Cap for Glass Bottle& Mushroom Liquid Culture Mason Jars by Biomed Scientific(Grey）

Material: Butyl RubberSize: 20mm/0.787inQuantity: 100Weight: 2g eachApplication:1.These stoppers can be used to make self-healing injection ports in Mason jar lids or medicine bottles.2. Mainly used for mushroom growing and liquid culture production. 3.Use with hypodermic needles to inject cultures, therefore eliminating the need to remove the lids on your culture jars. 4.They fit 13 mm (0.5118’’) diameter opening. They are 3/4” across the top, and 5/16” top to bottom. Simply use a 7/16 to 1/2 inch drill bit and drill a hole in metal or plastic jar lid and the stoppers pop right in place.

• Material:made of high quality Butyl rubber material, durable, washable and reusable
• Size:used for 20mm glass vial and liquid culture jars, fit about 13mm diameter opening
• Easy to use: no need to remove the glue plug, you can inject the culture with the injection needle
• Perfect seal: resistant to high temperature and washable, creating a great seal that extends the life of the material in the bottle
• Various Usages:suitable for kitchen, laboratory, hospital, etc.Great for liquid culture, injection ,refill tanks and grain masterbatches